Several streamers of oil washing up on the Chandeleur Islands cannot be cleaned up until the weather calms down and the boats can leave port, St. Bernard Parish government said in a news release.

The parish said the oil, approximately 400 barrels, was spotted Tuesday morning during a flyover on the Gulf side of the Chandeluer Islands, along the southern tip. An afternoon overflight of the area confirmed that oil had started to impact the islands, the news release said.

The parish said crews are on standby and when the weather clears they will begin a cleanup.

Strong winds and rough seas have stymied oil cleanup efforts across the Gulf of Mexico in recent days.